Add a bit of test coverage for callers of destructuring assignment

In particular, this covers one caller of CheckDestructuringElement
that didn't have tests before.

R=caitp@igalia.com

Review-Url: https://codereview.chromium.org/2267153002
Cr-Commit-Position: refs/heads/master@{#38841}

test/cctest/test-parsing.cc

@@ -6746,6 +6746,11 @@ TEST(DestructuringAssignmentNegativeTests) {
     "[x, y, ...[z] = [1]]",
     "[...[z] = [1]]",
 
+    "[...++x]",
+    "[...x--]",
+    "[...!x]",
+    "[...x + y]",
+
     // v8:4657
     "({ x: x4, x: (x+=1e4) })",
     "(({ x: x4, x: (x+=1e4) }))",